naming #4

We are expecting baby #4 this winter and are at a total loss when it comes to names. I've always been super picky when it comes to girls names, wanting something that is classy and timeless, yet not something you hear every day, with a bit of spunk and personality.
Our kids' names are:WesleyWalker "Wes" (6)WilliamHayes (goes by Hayes) (3)Anne-Blair (15 months)

Baby #4 is a girl! What are some suggestions based on what you gather from our naming style?